From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932116Ab1LWVbJ (ORCPT ); Fri, 23 Dec 2011 16:31:09 -0500 Received: from home.keithp.com ([63.227.221.253]:32919 "EHLO keithp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757802Ab1LWVbI (ORCPT ); Fri, 23 Dec 2011 16:31:08 -0500 From: Keith Packard To: Udo Steinberg Cc: Linux Kernel Mailing List , dri-devel@lists.freedesktop.org Subject: Re: GPU hung with Linux-3.2-rc6 In-Reply-To: <20111222014520.7ace1ab2@x220.fritz.box> References: <20111221195410.5e4c065a@x220.fritz.box> <864nwty9sq.fsf@sumi.keithp.com> <20111221222626.0b8c3a30@x220.fritz.box> <861urxy1pw.fsf@sumi.keithp.com> <20111222014520.7ace1ab2@x220.fritz.box> User-Agent: Notmuch/0.10.2 (http://notmuchmail.org) Emacs/23.3.1 (i486-pc-linux-gnu) Date: Fri, 23 Dec 2011 13:32:17 -0800 Message-ID: <86k45nnfdq.fsf@sumi.keithp.com> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="=-=-="; micalg=pgp-sha256; protocol="application/pgp-signature" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --=-=-= Content-Transfer-Encoding: quoted-printable It would also be nice to know if disabling VT-d in the BIOS resolves this issue, or if building the kernel with IOMMU support and then forcibly disabling it with 'intel_iommu=3Doff' fixes the problem. Given that you can easily reproduce this, it would be good to know how your machine differs from dozens of others which work fine with semaphores turned on... Oh, and the output of 'lspci -nn -vv' would be nice to see in case you've got older (or newer) chips... =2D-=20 keith.packard@intel.com --=-=-= Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iQIVAwUBTvTzYTYtFsjWk68qAQiaPhAAlWoTEuViaOCqmX8XtMPoXUjy9oDPhHnS W8WkhzPeq3CJS8SclHNQDCipEKcJzZVjw1tkdKicuRWnpZRtS9aPJxD/bYDc4KaF Deu2zy8AJWJNkpuDjm9Lc8if3VC2rNCqNRSYadKlLelS0+XPZUk1/CRWn0Hlsoxs lyZPaTFd2dOJWXVs3uog47Oka6rwaPreheJ9xOHbTITe0+dSolQl8gxTrlg1/N42 P8B1TgnriFCFg6LUGw3MsR5PzCdnuvfPrP8qKd5Jtx153y6ayxDwTjLDcrb/mBSd WtbTm4Cgh9dX151pk+EmGiTDU48gbH+qdbC+NTdy6dfDNSWXLhm/0WliHFrid7Pt Yyl7VYi3Mxcq2Surlc6ej9X6FNwRdAjFNGfFGOT1MeBx6izQEmtboCp33ugKp8Wj XR71y21ddKmraZfi/QTW+cpeKX6Fzu/ybTviXCpahMiETOWQSXCWzUoenUkmbmtB KBHnqtMzBMckN1RIuGgUL/KUkoAP5VZY9CIIpCIHCCxJ9OjLI6t2WVT1m8CNw3fZ Pj/UYhF4Qjorvs9wisY0S4vs4YHd2efeH/ae8PJYVbse8Y4swrIf/0bRoJx6rKRg tcAq60SqMIXW3PfGJx32CuB/pHqpePa6Ed6FoP9pLxUcknD4IRv24kG8EOwWiIEN ynRSd/jzlJk= =iPXN -----END PGP SIGNATURE----- --=-=-=--